I applied online. The process took one day.

The team lead called me at the scheduled time for what was supposed to be a phone screen. The person invited me to a video chat and proceeded to grill me with technical questions. I had to look at a piece of paper through the video chat on which the interviewer had drawn a figure, explaining the question to me. I had to solve it on a sheet of paper and hold it to my camera in order for the interviewer to look at it.

I didn't do well due to a lack of preparation and thinking of it to be just the usual phone screen. It was a great learning experience for me to understand what a simple, first phone screen can actually mean and gave me a good insight into how experienced professionals handle interviews. The only downside was holding the paper to the camera frequently and trying to explain each step as I solved it. It could have been done in a more efficient way.

State space modeling ranging from simple to more complex systems.